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      <title>项目那个地方用到了异步编程，项目中用到多线程吗？ - 交互式测验</title>
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    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>项目那个地方用到了异步编程，项目中用到多线程吗？ - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
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  {
    "question": "根据文档，异步编程在处理I/O密集型任务（如网络请求）时的主要优势是什么？",
    "options": [
      "它允许多个CPU核心同时处理同一个请求，从而加快速度。",
      "它通过避免线程阻塞，允许程序在等待I/O操作完成时执行其他任务，从而提高效率。",
      "它能保证所有的I/O操作严格按照代码顺序同步完成。",
      "它能自动减少程序的内存占用。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档明确指出，异步编程的核心优势在于其非阻塞特性。当程序发起一个耗时的I/O操作时，它不必等待操作完成，而是可以继续处理其他工作，从而极大地提高了程序的整体性能和资源利用率。",
    "source": "文档中「异步编程的应用场景」部分",
    "hint": "思考一下文档中关于异步编程如何提高效率的描述：“...允许程序在等待某些操作（如网络请求、磁盘读写）完成时继续执行其他任务...”"
  },
  {
    "question": "在开发图形用户界面（GUI）应用时，为什么推荐使用异步编程来处理长时间运行的任务？",
    "options": [
      "为了在后台并行执行多个UI渲染任务。",
      "为了减少代码的复杂度。",
      "为了避免阻塞主线程，从而保持用户界面的响应性，防止程序“卡死”。",
      "为了让应用可以同时被多个用户操作。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "GUI应用通常有一个专门负责处理用户输入和界面更新的主线程（或UI线程）。如果在该线程上执行耗时操作（如文件下载、复杂计算），会导致界面无法响应用户的点击、拖拽等操作。异步编程可以将这些耗时任务放到后台线程执行，从而确保主线程始终畅通，维持应用的响应性。",
    "source": "文档中「异步编程的应用场景」部分",
    "hint": "文档在“用户界面（UI）应用”条目中提到了异步编程的关键作用，与哪个词有关？响应性还是并行性？"
  },
  {
    "question": "文档中提到，多线程编程在处理哪一类任务时特别有效？",
    "options": [
      "主要用于处理简单的、顺序执行的逻辑。",
      "在计算密集型任务（如图像处理、数据分析）中实现并行处理。",
      "专门用于处理来自消息队列的异步消息。",
      "用于管理用户界面的事件循环。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "多线程编程的核心价值在于利用多核CPU实现真正的并行计算。对于那些可以被分解为多个独立子任务的计算密集型工作（如处理一张大图的不同部分），多线程可以让这些子任务同时在不同CPU核心上运行，从而显著缩短总处理时间。",
    "source": "文档中「多线程编程的应用场景」部分",
    "hint": "查阅“并发处理”部分，看看多线程主要被用来处理哪种类型的任务。"
  },
  {
    "question": "在服务器端编程中，多线程的一个常见应用场景是什么？",
    "options": [
      "使用单个线程处理所有来自客户端的请求，以确保顺序性。",
      "为每个客户端请求创建一个新的操作系统进程。",
      "使用线程池来高效地处理并发的客户端请求。",
      "将所有请求都转发到消息队列中进行异步处理。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "现代服务器需要同时为成百上千的客户端提供服务。为每个请求都创建一个新线程开销巨大。因此，业界普遍采用线程池技术：预先创建一组线程，当新请求到达时，从池中取出一个空闲线程来处理它，处理完毕后线程归还池中。这种方式既实现了并发处理，又有效控制了系统资源消耗。",
    "source": "文档中「多线程编程的应用场景」部分",
    "hint": "文档的“服务器端编程”条目描述了多线程如何应对并发场景，其中提到了一个关键技术。"
  },
  {
    "question": "文档是如何描述异步编程和多线程编程之间关系的？",
    "options": [
      "它们是两种完全对立的技术，在一个项目中只能选择其中一种。",
      "多线程编程是异步编程的过时替代品。",
      "异步编程和多线程编程通常结合使用，例如使用线程池来执行异步任务。",
      "异步编程主要用于前端，而多线程编程专用于后端。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "异步编程和多线程编程并非互斥，而是相辅相成的。异步编程定义了一种非阻塞的编程模型，而多线程（特别是线程池）则为这个模型提供了底层的执行能力。例如，一个异步任务（如CompletableFuture）最终还是需要一个或多个线程来实际执行它。",
    "source": "文档中「结合异步编程和多线程编程」部分",
    "hint": "文档的最后一部分标题是什么？它直接揭示了两者之间的关系。"
  },
  {
    "question": "根据文档，像 Kafka、RabbitMQ 这样的技术在分布式系统中主要用于实现什么？",
    "options": [
      "实现跨服务的并行计算。",
      "作为分布式数据库来存储数据。",
      "作为线程池来管理并发任务。",
      "实现异步消息传递和事件驱动架构。"
    ],
    "correctAnswerIndex": 3,
    "explanation": "Kafka和RabbitMQ是业界主流的消息队列中间件。在微服务或分布式架构中，它们扮演着解耦服务、削峰填谷、实现异步通信的角色。服务之间通过向队列发送和消费消息来进行通信，这是一种典型的异步编程和事件驱动模式的应用。",
    "source": "文档中「异步编程的应用场景」部分",
    "hint": "在“分布式系统”的应用场景中，文档提到了使用消息队列来实现什么目的？"
  },
  {
    "question": "在响应式编程框架（如 Reactor, RxJava）中，底层的异步操作通常是由什么技术来支撑实现的？",
    "options": [
      "单线程事件循环",
      "多线程",
      "操作系统进程",
      "协程"
    ],
    "correctAnswerIndex": 1,
    "explanation": "响应式编程框架通过构建数据流（Stream）来处理异步事件。虽然它为开发者提供了高级的、声明式的API，但其底层的调度和执行（即让这些异步操作真正运行起来）依赖于多线程机制，通常会使用高效的线程池来管理。",
    "source": "文档中「结合异步编程和多线程编程」部分",
    "hint": "在“响应式编程”条目中，文档提到“底层会使用______来实现异步操作”。"
  }
];
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            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
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            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

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                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
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                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
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                '<div class="score-card">' +
                '<h3>错误率</h3>' +
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                '<div class="score-card score-details">' +
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                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

            let reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  